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Home >> Chrysler >> 2012 >> 300 Limited, 4WD, Gas >> Repair and Diagnosis >> Engine Performance >> System >> 3.6L - DTCS P000A To P0159 >> Diagnosis And Testing >> P0139-O2 Sensor 1/2 Slow Response >> Possible Causes
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Possible Causes

Possible Causes
EXHAUST LEAK
(K141) O2 SENSOR 1/2 SIGNAL CIRCUIT
(K904) O2 SENSOR 1/2 RETURN CIRCUIT
O2 SENSOR 1/2

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to  PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  . 

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